Boiler



JL T. BUNTING BOILER Filed March 20. 1920 3 Sheets-Sheet 1 Jan. 3, 1928. 1,655.046

J. T. HUNTING BOILER Filed March 20. 1320 3 Sheets-Sheet 2 Jan. 3, 192s. I 1,655,046

' J. T. BL'JNTING BOILER Filed March 20. 1920 3 Sheets-Sheet 5 lllll II ll! Patented Jan. 3, 1928.

PATENT OFFICE.

JOHN T. BUNTING, OF CHICAGO, ILLINOIS.

BOILER.

Application filed March 20, 1920. Serial No. 367,509.

This invention relatesin general to boilers and hasfor its object broadly the provision ofra boilerfor heating purposes and of small size, adapted to operate efficiently with ga; low fuel consumption.

My invention contemplates the provision of'aboiler forhot water or steam heating purposes, wherein the hot gases resulting froml the ,combustion ofthe coaly or other fuel arecarried with, highly efficient heating effect through a tortuous path from the zone ofcombust-ion to the stack outlet.

The embodiment of theY invention shown on the. drawings 1 discloses an apparatus adapted for use in a hot water heating plant, although it will be manifest when the in@ vention is better understood that thel invention may be used, in apparatus particularly adapted for the heating by steam or hot air.

Another and highly important object of the invention is the provision ofk a boiler adapted toentirely consume fuel when soft' coal or other ordinarily smoking fuel iS., einev ployed, with the result that; no smoke issues from the stack.

A more specific object of the invention is the provision of aY boiler whichmay be of greatly reduced size for a given heating;`

requirement.

Numerous other objects and advantages of the invention will be apparent `as it is better. understood from the following description when. considered in connection with` they accompanying drawings illustrating a preferred embodiment thereof.

Referringto the drawing, Fig. 1 vis a front elevation of a boiler embodying my present invention.

Fig. 2l isa rear view thereof.

Fig. 3 is a section taken on line3e-3 of Fig.Y Y1.V

Figri isa section taken substantially on the line d-iof Fig. 3.

Fig. 5 isr a section taken substantially on the line 5 5 of Fig. 3 and Fig. 6 is a section taken substantially on the line 6 6 of Fig.' 3.

TheV boiler shown onthe drawings and embodying my present invention is so constructed andarranged thatthe heated gasesl from the fire-box pass frstto the rear of the boiler andl into'one side of a dividedy chamber, from which they move upwardly and thenthrough fire tubes into a, chamber at" tubes pass through the boiler, and the heated gases of combustion being conveyed back and forth across it give od further heat in their double passage through the water.

A brick structure is provided comprising brick side walls 11, a brick dome or top 12, land a brickback wall 13.Y rlfhe front wall of the boiler comprises a bottom part 14 in which is providedthe usual ash pit door 15, carrying a draft door 16. Above this bottom part 14 is arranged the` main frontwall portion 17, provided with a` fire-box or charging door 18 of any usual or preferred construction. Above the ire-box door there are provided two clean-out doors 2O permit. ting access to the fiues as will be presently described.

Referring to Fig. 3 it will be noted that cross members of T-form 19 and 21 and a front angle member 22 are provided to extend between the internal metal side walls 23 which are positioned` against the brick walls 11 in the assembled structure. An abutment 24 is provided within and at the bottom of the back brick wall 13 and upon the rear T-iron 21 are laid bricks 25, forming thebottom of a chamber 26, thepurpose of which will be presently described. Upon Tsl 19 and 21 is built a brick wall 27, providing a flue opening 28 therethrough, this opening being preferably located at one side of the vertical front to back central plane. The grate indicated at 29 rests upon the front angle member 22 and the T 19.

The boiler comprises an outer shell or wall 31 with front and rear end walls 17 and 36, and a crown shieldvor inner wall 34 with ends 32 and 35. The inner and outer walls 31 and3fi are extended, spaced apart at the` sides, and connected at 'the bottoms of these sideV portions to form side water jackets continuous with those at the ends which are formed by spacing apart the end walls 17 ,o

lll

.bottom spacers 32 and 35. rlfhus the fire box fined by a ring 39 inset inthese walls and in registration with suitably provided openings therethrough.

he main back wall of the boiler is spaced from the rearbrick wall 13 to provide a fine chamber 4l.l The flue chamber 4l is divided by a central vertical partition 43 extending from the abutment 24 to well up th-e side of the boiler. The yspace provided at one side of such partition is closed at the top by atop wall 42, while the space at the other side is left open and is in communica'- tion with the stack outlet, as will be presently described.

A number of flues 44 extend through the boiler from front to back of the furnace having their ends'mounted in the front wall 17 and in the main rear Wall 36 at the back of the boiler.

The'doors 20 are spaced out from the front wall 17 by a box member 45 which forms a flue chamber 46 at the front. All of the llues 44 open into this front chamber and they are so arranged that half of suchflues open into the space at one side of the parti# tion 43'at the back andthe other half open into the space at the other side of this partition.- The opening 38 is staggered with respect to the opening 28 so that the gases of'combustion have to pass into the chamber 26 which is a smoke consuming chamber, and then transversely through this chamber to the opening 38 and into the space at one Side of the partition 43 at the back, this space in the present instance being thatv located at ythe right-hand side of the boiler. The gases of combustion then pass up through this flue portion and forwardly throughk theA boiler through the right-hand set of tubes 44 into the chamber 46 at thefront.l From this chamber the heated gases pass back through the other set of :dues into the spacepat the other side of the partition and this space is in free communication with the stack 47.

I introduce outside'air above the grate and also -into the space 26 therebehind,this air being admitted in the present instance by pipes 48 extending down through thetop wall and'fthrough the boiler and provided at'jtheirlower ends With outlet openings 49.

Suitable means indicated at V5l are provided to control the amount of air admitted through the pipesv 48. rThe air admitted by theseA pipesand mingling with the hot gases results inthe completion of the combustion Vand* the oxidation of the usual smokev gases which result from certain fuels as, forexarnple, soft coal.

The circulation of water is in at inlet 52 near the bottom of the boiler at the back and out at 53 in the usual manner. Y

The "clean-out openings 55 are provided at the back to Vpermit cleaning of soot from the divided line parts at the back, and the usual gauges 56 and safety devices 57; are provided. r- Experience has demonstrated that a boiler embodying my present invention will have substantially twice the heating capacity of theboilers ordinarily employed; that is to say, it has been found that the boiler einbodying my inventionk will have substantially the heating power of a present boiler of twice the size, i

It will be noted thatthe outlet 38 from the smoke consumingchamber 26 is materially less in area than'the stack and flueY space. This results in whatmight be termedVv a clicking of the gases of combustion within the chamber 26. Air is admitted in lsuitable fashion as through the pipe 48 atY the right of Fig. 5 into this chamber and the flamev work of the boiler may be assembled in Va single unit-at the factory,'ex'cept of course that the safety devices and grate bars need not be attached, the point being that the brickwork is of a character that permits it to loe-readily built into and about the boiler after the boiler is constructed and Vat the time .it is being installed into the buildings.

It is thought that the invention and many of lits attendant advantages will be understood from the foregoing vwithout further description and it will bev manifest that' various changes may be made in the' form, construction and: .arrangementl ofv the parts without departing from the spirit and scope of the inventionfor sacricing all of its material advantages.A Iclaim: f if l. A boiler comprising an overlying lire tube portion' with depending water jacket-y ing sides and ends, a cross partition between the sides with an 'opening through' one side of the partition, the 'jacketing boilerV ends having lire door and smoke flue openings respectively therethrough, the smoke flue' open- Ving being Von the side ofy the boiler opposite the opening in the'partition to cause a trans' verse movement ofthe products'ofcom'bustion back of the partition and against the rear jacketed end, means'forminga partitionedlue box at the rear of the fire tubes,

opening land the other portion connected with the smoke stack, and a flue box at-the one portion connectedfwith the smoke flue front of the Hre tubes so that the products of combustion are directed through the Hre tubes first in one direction and then in the other.

2. A boiler having an overlying Hre tube portion with depending Water jacketing sides and ends, having a 'front door and a smoke Hue at one side of the rear end extending through the jacketing portion, means connecting the smoke Hue With the Hre tube portion, and a cross partition Within the depending portionl of the boiler with an opening at the side opposite the smoke Hue opening to cause a transverse movement of the hot gases belovv the Hre tube portion.

3. A boiler having an overlying tire tube portion with depending Water jacketing sides and ends, having a front door and a smoke Hue at one side of the rear end extending through the jacketing portions, means portion with depending Water jacketin sides and ends, having a. front fire door an a smoke Hue at one side of the rear end eX- tending through the jacketing portion, and a Water inlet at the bottom of the rear end, and a cross partition between the depending sides with an opening at the side opposite the smoke Hue opening in the rear to cause a transverse movement of the hot gases from the Hre box along the rear Wall adjacent the Water inlet for the boiler.

5. A boiler comprising an overlying Hre tube portion with depending Water Jacketing sides and ends, a cross partition between the sides With an opening at one side of the partition, the rear end having a Hue opening at the opposite side of the boiler, whereby a transverse movement of the products of co1nbustion is caused in the chamber at the rear of the partition.

6. A boiler comprising an overlying Hre tube portion with depending Water jacketing sides and ends, a cross partition between the sides, the partition and rear end having openings therethrough at opposite sides 0f the boiler to ca use a transverse movement of the products of combustion between the partition and the said rear end.

JOHN T. BUN TING. 

